$\"\"$

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The equations are

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$\"\"$ (Equation 1)

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$\"\"$ (Equation 2)

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Since $\"\"$ , substitute $\"\"$ for y in the first equation.

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$\"\"$ (Equation 1)

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$\"\"$ (Replace $\"\"$ ) $\"\"$

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Distribute terms using distributive property: $\"\"$ .

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$\"\"$

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Subtract: $\"\"$ ) $\"\"$

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Apply subtraction property of equality: Subtract 49 from each side.

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$\"\"$

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$\"\"$ (Apply additive inverse property: $\"\"$ )

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$\"\"$ (Apply additive identity property: $\"\"$ )

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$\"\"$ (Subtract: $\"\"$ ) $\"\"$

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$\"\"$ (Divide each side by 3)

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$\"\"$ (Cancel common terms)

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$\"\"$ (Divide: $\"\"$ )

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$\"\"$ (Multiply each side by negative one)

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$\"\"$ (Product of two same signs is positive) $\"\"$

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Now Substitute 13 for x in either equation to find the value of y.

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$\"\"$ (Equation 2)

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$\"\"$ (Replace x by 13 )

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$\"\"$ (Subtract: $\"\"$ )

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The solution is $\"\"$ $\"\"$

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The solution is $\"\"$ .